Improvement in compound box-girders



4Axim.

Gbmpoqnd Box-Girder.

N0164I734" A PatentedJune 22,1815.

0 GAD G O .O O

I l -i L @van F132. a.

' W/W y@ THE GRAPHIC C0. PH DTD -LITH-SQ 8: 41 PARK PLACE, N.Y.

UNITED STATES ATENT EETGE.

ADAM HAY, OF NEWARK, NEW JERSEY, ASSIGNOR 0F ONE-HALF HIS RIGHT TO PAUL G. BATTICHER,l OF SAME PLAGE.

IMPROVEMENT IN COMPOUND BOX-GIRDERS.

Specification forming part of Leiters Patent No. 164,734, dated June Q2, 1875; application filed June 8, 187.5.

To all whom it may concern:

Be it known that I, ADAM HAY, of Newark, in the county of Essex and State of New Jersey, have invented a certain Improved Compound BoX-Girder, of which the following is a specification My invention consists in uniting wroughtiron and cast-iron in the formation of boxgirders for walls, stone fronts, and other places, so that the strength shall be greatly increased.

Figure l is a front side View ofthe girder, with the heads ofthe bolts countersunk, to leave an even surface. Fig. 2 is across-section. Fig. 3 is a longitudinal section. Fig. 4 is a plan View. Fig. 5 is a section showing a modification that may sometimes be used.

The girders, as ordinarily made ofeast-iron, are very diflicult and expensive to east in size as required, and are often liable to be spoiled in casting, or to be broken afterward. To remedy this difficulty is the object of this invention. I therefore make a union or coinpound girder, combining wrought-iron and cast-iron to meet the demand, as follows:

rlhe base or flange B is made of cast-iron, and is cast with the ribs C attached at such intervals as may be required to stiffen and strengthen the sides. The sides A are wrought-iron plates bolted together, through or by the side of the ribs, with iron bolts l). As a modification ofthe cast-iron parts, Fig. 5 shows the ilange B cast with dovetail slots B in them, and corresponding tenons in the ribs to slide into them. rlhis even reduces the expense and liability in casting the base or ange B, and in some instances it will be found to add increased strength to the girder. rIhe vcompound girder may be produced at about the same cost as those made entirely of cast-iron, and then the strength is very greatly increased. The wrought-iron sides and the bolts binding` them to the cast-iron base and ribs accomplish a Very valuable improvement.

I claim- The compound girder embracing the castiron base B, and ribs C, and the wrought-iron sides A, united by the bolts I), substantially as and for the purposes specified.

ADAM HAY.

Witnesses HoRAoE HARRIS, A. L. GRoss. 

